The findings are the latest example of how the notion of a single price is breaking down in the digital age, a trend economists say could be pushing up some prices.
In tests in four cities across the country, nearly 200 volunteers checked prices on 20 grocery items on Instacart. They found differences in item after item.
From Sweden to Brazil, six small companies talk about how they are communicating with their U.S. customers amid uncertainty over Trump’s changing tariffs.